#15946: Exceptions used for program logic db/utils.py load_backend
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Reporter: sgronblo@… | Owner: nobody
Type: Bug | Status: new
Milestone: | Component: Database layer (models, ORM)
Version: 1.2 | Severity: Normal
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Easy pickings: 0
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I noticed this problem when trying to figure out why one of my views
wouldn't load. The problem there seems to be that it catches both
ImportErrors and AttributeErrors in the same catch. I tried modifying the
code to explode at when import_module calls __import__ instead but then
Django stopped working.
This is because of how db/utils.py's load_backend tries to determine if
you have used a non-package-prefixed name when specifying your db backend.
load_backend does this by blindly prefixing the provded backend name with
django.db.backends and then importing it. If the import succeeds Django
thinks you used the short name and if it fails Django thinks you specified
the prefixed name.
It would probably have been better to just check if the module name begins
with django.db.backends or not instead of relying on import
success/failure?
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Ticket URL: <http://code.djangoproject.com/ticket/15946>
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